Clearwire has just launched Rover, a pay-as-you-go 4G mobile broadband service, and it you live and travel comfortably within Clearwire’s coverage area, this might be the excuse to ditch that capped dataplan and finally embrace WiMax.

Rover offers unlimited WiMax for just $5 a day, $20 a week or $50 a month. You just wander into a store and top up your account, no contract required. Just top up as you go, in either $20 or $50 denominations.

Of course, Rover’s no good without the hardware, which is where Clearwire’s modems come in. The Rover Stick is less interesting: it costs $99.99 and just plugs into your computer’s USB port. The Rover Puck, though, is very cool. It’s a mobile WiFi hotspot that will share a single WiMax connection with up to eight devices connected to it for up to four hours a charge, and recharges through USB. It costs $149.99.

Both modems come with two days inclusive Rover use, so you can test the products before deciding whether or not you want to return them through the fourteen day “no questions asked” return policy.

These are very good prices for WiMax, providing you get the coverage. The only thing to keep in mind is neither product supports 3G, so you’ll get no mobile data at all outside of Clearwire’s network. Still, if you want to live on the 4G cutting edge without getting burned, Clearwire’s Rover service is as good as it’s going to get.